Samuel Bernard samubernard
samubernard
/ svd_lowrank.py
Last active
August 29, 2015 14:10
Exemple d'approximation d'une matrice image par des matrices de bas rangs.
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| from numpy import * | |
| # chargez une image stockée dans un tableau (image monocolore) | |
| im = genfromtxt('image.csv') | |
| # Décomposition en valeurs singulières | |
| U, s, Vs = linalg.svd(im, full_matrices=True) | |
| # Dimension des matrices | |
| U.shape |
samubernard
/ methode_puissance.py
Last active
December 7, 2015 01:00
Méthode de la puissance pour le calcul des valeurs propres -- code phyton
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| # coding: utf-8 | |
| ## Méthode de la puissance pour le calcul de valeurs propres | |
| # In[1]: | |
| from numpy import * | |
| import matplotlib as plt | |
| import pylab as pl |
samubernard
/ tennis_ranking.ipynb
Created
September 18, 2016 08:56
Exemple de classement WTP par vecteur propre dominant
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samubernard
/ algo_QR_pur.ipynb
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September 18, 2016 09:07
Exemple algorithme QR pur pour le calcul des valeurs propres
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samubernard
/ polynome_wilkinson.ipynb
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September 18, 2016 09:07
Exemple de calcul de racines d'un polynôme
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samubernard
/ factqr.ipynb
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September 18, 2016 09:08
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samubernard
/ svd_pca.ipynb
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September 18, 2016 09:09
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| function [c,f,s] = turing(x,t,u,DuDx) | |
| % TURING PDE components for the Turing equations | |
| % | |
| % Examples | |
| % x = -20:0.1:20; | |
| % t = 0:20; | |
| % sol = pdepe(0,@turing,@turingic,@turingbc,x,t); | |
| % u = sol(:,:,1); | |
| % v = sol(:,:,2); | |
| % imagesc(x,t,u); axis xy; |
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| function sol = kuramoto | |
| % KURAMOTO Systeme d'oscillateurs de phase couples | |
| % sol = kuramoto resoud un systeme de N d'oscillateurs de phase couples | |
| % intervalle d'integration | |
| t0 = 0; | |
| tfinal = 500; | |
| % nombre d'oscillateurs | |
| N = 400; |
samubernard
/ methode_puissance.ipynb
Last active
May 14, 2018 13:31
Méthode de la puissance pour le calcul des valeurs propres -- notebook iphyton
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